PS - and no, the Continental slicks are no better than before , cheap , but slower than any listed above. For the guy just doing HPDEs or casual weekend track events, they are better than most 200 Treadwear street tires.
+1
Last year's discontinued Conti Stickers (G5500) were claimed to be the same compound as R7's, but in my experience they are 2s slower. I ran 305/650R18's up front and 305/680R18's on the rear on both my Race Car and the R. The 305's are wide -- about the same as Hoosier 315's. With the Contis, the rear was also loose. Have a feeling the taller rear Tire may meed more Camber.